30KW DCDC for traction

Release time:

2023-05-24 10:25

 

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PROJECT INTRODUCTION
This reference design is a 30kW wide range DC/DC converter withinput range 400-950Vdc, rated output 110V/273A (output range90V~130V). The main topology adopts interleaved parallel Boost andLLC, and output rectifier used Schottky diode to get the extremelyhigh efficiency and reliability. This solution can be widely used inrailway or subway ground power supply.
 
DESIGN SPECIFICATION
Input Voltage 400vdc-700Vdc
Output Voltage 90-130Vdc
Rated Power 30KW
System Efficiency 95%
Switching Frequency Boost:45KHz;LLC:60~150KHz

 

FEATURES

· Base on SiC design, fsw up to 50KHz, greatly reduce system volume;

· Agileswitch SiC module driver board, with short circuit protection:

· High system efficiency, up to 95%;

· Interleaved Boost, minimize the current ripple and inductor volume:

· LLC primary in series and secondary in parallel connection;

· Battery temperature compensation, real-time calibrate charging curve

· Full protection, including input OVP, UVP & OCP, output OVP, UVP & OCP

 

MAIN TOPOLOGY

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MAIN DEVICES
 
Function Part Number Brand
Bbost MOS C2M0045150D Wolfspeed
Boost Diode C3D25770H Wolfspeed
Boost Rectifier Bridge VUO160-16NO7 力特
BOOST MOSFET Driver IXDN609SIA 力特
LLC MOS CAS300M17BM2 Wolfspeed
LLc Diode DSA3001200NA 力特
LLC MOSFET Driver NSI6602B-DSPNR 纳芯微

 

 MEASUREMENT RESULTS AND WAVEFORMS

picBoost: 500Vin 30kW 2 Channels Vgs&Vds 

picBoost: 500Vin 3kW 2 Channels Vgs&Vds&Iind

 

 

picLLC START UP @ 15KW LOAD

picLLC START UP  NO LOAD

 

 

picDYNAMIC: OUTPUT 1KW TRANSFER TO 3OKW

picLLC WORKING WAVEFORM 30KW LOAD

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30KW DCDC for traction

2023-05-24